Montessori Relative Numbers: Introduction Presentation includes following contents: Relative Bead BarsRelative Holding BarsHow to calculate relative numbers (7 examples)Workbook Information: Workbook is available at: https://www.teacherspayteachers.com/Product/Montessori-Relative-Numbers-Introduction-Workbook-9205674This video has NO SOUND. A teacher should explain the contents of this video just like as to give the Montessori presentation to children.